The Z80 feeling

So you've learned a little z80. You know ld, cp and jp, and think that's all.
As far as commands go, that's most of it indeed; you'll get the job done
(usually). However, the thing with z80 is, with a little experience and
feeling you can make everything twice as fast, half as big. That's what
I love about it :)

Below's a short list of common mistakes, or impurities rather, by beginning
programmers. Most more experienced programmers will (or should) already
know better. But for those who can't feel the ugly code, just remember these
few rules. (Note: of course there are a lot of exceptions, these are just
basic guidelines.)